My perfect camera would be customisable from the factory.
I would be able to go to my local outlet, pick the form factor (d700, d3or4, mirrorless). Then choose sensor mp, highest iso/ low light ability, DR, gps, wifi, video, auto HDR, auto pano, or, any feature/benefit/model variation, that I wish to pay for, just like ordering an automobile (paint, engine size, fuel type, sedan/wagon/4x4 etc) .
That way I choose how much "stuff" I need/can afford in a camera.
My choices would be something like a) combo S5 fuji/D4 Nikon in FF, 16mp is cool. this is a for work camera.
b) 30mp-50mp FF in a body size of d3100, reasonable AF,iso 25- 6400max (on a top plate dial), interchangable lenses, shutter & aperture controlled by front and back wheels (ala dxxx cameras), 2 card slots, smallish battery (dont want it too heavy). This would be my "play" camera, or, if the odd client needed huge files.
Not too hard is it....giving the customer what they want ??
p.s. side benefit to this would be (well maybe ?)....less whining about what features a new camera had or didn't have.